NucMedTech
So are you going for a NASCAR one next?
Which actually poses a different question: What does a "stock" a/g car "look" like?
Which means getting into some supposition.
If you can create a big field which can be negated in the cockpit/passenger area (preventing motion sickness), then you just need a tiltable field that woul be under most of the vehicle. It would want gimballing to put the lower gravity potential in the desired direction of travel (the vehicle would then "fall" toward the lower potential, producing movement. Aero would be mostly for styling if you can dial up 1.1G on one side and 0.9G on the other side, angular momnetum would do the rest.
If you have to worry about tidal effects on the passengers, or can have tiny field units, you'd like use pairs at the corners to make attractor/repulsor pairs. You'd need soem ground force by aero by the time you dialed the pair strength up to the material strength of the road metal (you can push "down" on pavement to about 5-6000psi, but only "up" to around 850-950psi before the pavement starts crumbling).
If, say, you can only make a field about "car" sized, and can't tip it so very much, what you have is a hovercraft. Aero will matter a lot, as you are going to need to be able to move air or use some sort of traction against the road surface (which could be magnetic).
So, those are going to be unique 'stock cars' And don't you know that Nascar would like just put a big field generator in the floor board for more down force, if down force were wanted.
Let your mind imagine those "looks." One might be as aerodynamic as a brick; another mighte ban oblated teardrop; another might look like a Dornier Arrow with no wings.